Preprocessor 8b MCU SPI type (new or old type) select

[trastikata]

Hello Les,

is it possible for the Preprocessor to select based on the type of SPI used in the device i.e. the new 8b Q-micros or the classic SPI register set?

Thank you.

[top204]

The only thing the preprocessor can do for that type of comparison, is look at the SFRs in the .def file, and if a certain SFR is present, then it is a particular SPI mechanism.

Microchip are notorious for changing things for very little reason.

Regards
Les

[trastikata]

The only thing the preprocessor can do for that type of comparison, is look at the SFRs in the .def file, and if a certain SFR is present, then it is a particular SPI mechanism.

Perfect, thank you Les.

This did the job because the new SPI registers set use SPIxRXB and SPIxTXB instead of the old SSPxBUF to hold TX/RX data.

Code Select Expand

'Device 18F57Q83
Device = 18F67K22
Declare Xtal 4

$ifdef _SPI1TXB
    $define SPI_MODE 1
$else   
    $ifdef _SSP1BUF    
        $define SPI_MODE 0
    $endif
$endif   

$if SPI_MODE = 1
    SPI1CON0.7 = 1
    SPI1CON1.6 = 1
    SPI1BAUD = 1

    SPI2CON0.7 = 1  
    SPI2CON1.6 = 1
    SPI2BAUD = 1
$elseif SPI_MODE = 0
    SSP1STAT.6 = 1
    SSP1CON1 = %00100000
   
    SSP2STAT.6 = 1
    SSP2CON1 = %00100000
$endif